Cardiff was made capital of Wales in 1955 and since then the city has emerged as one of the most vibrant urban centres in the UK. Whether you’re a sports fan, shopaholic, foodie or culture buff you’ll find Cardiff has it all. 1. Although Cardiff is the UK’s 10th largest city, with a population of about 346,000, it is one of the smallest cities throughout Europe. 2. The first football final to be broadcast live on the radio by the BBC was the 1927 FA cup final between Cardiff City and Arsenal.